Just shy of 9 hours last night (daily driving limit is 9hrs, you can extend to 10hrs twice per week)
From my diary (I always record what I do for my own records)
8:50hrs driving
0:50hrs break (legal requirement 45min after 4:30hrs driving, company like us to take :50min)
1:50hrs Period of availability (waiting around in other words)
3:30hrs other work
